Radeon HD 6850 vs Radeon R9 M375X

Intro

Compare those specs to the Radeon R9 M375X, which has a core clock frequency of 1015 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 6850 should be quite a bit faster than the Radeon R9 M375X overall. (explain)

Radeon HD 6850		128000 MB/sec
Radeon R9 M375X		72000 MB/sec
	Difference: 56000 (78%)

Texel Rate

The Radeon R9 M375X is just a bit (about 9%) more effective at anisotropic filtering than the Radeon HD 6850. (explain)

Radeon R9 M375X		40600 Mtexels/sec
Radeon HD 6850		37200 Mtexels/sec
	Difference: 3400 (9%)

Pixel Rate

The Radeon HD 6850 is quite a bit (about 53%) better at anti-aliasing than the Radeon R9 M375X, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 6850		24800 Mpixels/sec
Radeon R9 M375X		16240 Mpixels/sec
	Difference: 8560 (53%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.